參數(shù)資料
型號(hào)： UCC2977
廠商： Texas Instruments, Inc.
英文描述： Multi-Topology Piezoelectric Transformer Controller
中文描述： 多拓?fù)鋲弘娮儔浩骺刂破?/td>
文件頁數(shù)： 14/28頁
文件大?。?/td> 433K
代理商： UCC2977
SLUS499A
–
NOVEMBER 2001
–
REVISED JANUARY 2002
14
www.ti.com
APPLICATION INFORMATION
Equations 8 and 9 are derived by solving Laplace or differential equations for the RC decay time from 1.7 V to
0.7 V with and without the effect of V
COMP
. The resulting frequency of the system is given in equation 10. This
frequency should be verified in the lab and may need adjustment depending on factors such as extra
capacitance at the OSC pin (oscilloscope measurements can affect frequency) as well as noise. Figure 12
shows the resulting frequency-to-control voltage relationship with the component values listed below the figure
and a t
CHG
time of 500 ns.
Figure 12
f
–
–
ERROR AMPLIFIER VOLTAGE
vs
OSCILLATOR FREQUENCY
VCOMP
–
Error Amplifier Voltage
–
V
0
0.5
1.0
1.5
2.0
2.5
62
60
70
64
74
80
76
68
66
78
72
ROSC = 15.8 k
COSC = 560 pF
RANGE = 162 k
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參數(shù)描述
UCC2977EVM 功能描述:電源管理IC開發(fā)工具 UCC2977 Eval Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V
UCC2977PW 功能描述:LCD 驅(qū)動(dòng)器 Multi-Topology Piezoelectric RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時(shí)鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube
UCC2977PWG4 功能描述:LCD 驅(qū)動(dòng)器 Multi-Topology Piezoelectric RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時(shí)鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube
UCC2977PWR 功能描述:LCD 驅(qū)動(dòng)器 Multi-Topology Piezoelectric RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時(shí)鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube
UCC2977PWRG4 功能描述:LCD 驅(qū)動(dòng)器 Multi-Topology Piezoelectric RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時(shí)鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube
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